//
//  LMJNetWorkRequestManager.m
//  EPA
//
//  Created by lanou3g on 16/4/15.
//  Copyright © 2016年 lanou3g. All rights reserved.
//

#import "LMJNetWorkRequestManager.h"

@interface LMJNetWorkRequestManager ()
//存储回调blockde 的属性
@property(nonatomic, copy) ResultBlock block;

@end
@implementation LMJNetWorkRequestManager
//单例方法(可写可不写)
+ (instancetype)defaultManager {
    static LMJNetWorkRequestManager *manager = nil;
    @synchronized(self) {
        if (!manager) {
            manager = [[LMJNetWorkRequestManager alloc]init];
        }
    }
    return manager;
}
//请求方法
+(void)requestURL:(NSURL *)url Method: (URLRequestMethod)method Params:(NSDictionary *)param Result:(ResultBlock)resultBlock{
    //空的可变字符串
    NSMutableString *urlString = [NSMutableString new];
    if ([url isKindOfClass:[NSURL class]]) {
        //拼接url
        [urlString appendString: url.absoluteString];
    }else if ( [url isKindOfClass:[NSString class]]) {
        [urlString appendString:(NSString *)url];
    }
    if (urlString.length == 0) {
        NSError *error = [NSError errorWithDomain:@"EPA" code:251 userInfo:@{@"reason" : @"你输入的网址不正确"}];
        resultBlock(nil, nil, error);
        return;
    }
    //把参数字典转为字符串
    LMJNetWorkRequestManager *manager = [LMJNetWorkRequestManager new];
//    manager.block = resultBlock;
    NSString *paraStr = [manager strFromDict:param];
    switch (method) {
        case LMJ_GET:
        {
            if (paraStr.length > 0) {
                [urlString appendFormat:@"?%@",paraStr];
            }
            [urlString appendString:paraStr];
            [manager requestURL:[NSURL URLWithString:urlString] resultBlock:resultBlock];
        }
            break;
            
            case LMJ_POST:
            [manager postURL:urlString ParaStr:paraStr resultBlock:resultBlock];
            break;
        default:
            break;
    }
}
//Get网络请求
-(void)requestURL:(NSURL *)url  resultBlock:(ResultBlock)block {
//    __weak typeof(self) weakSelf = self;
    
    NSURLSessionDataTask *dataTask = [[NSURLSession sharedSession]dataTaskWithURL:url completionHandler:block];
                
    //开始网络请求
    [dataTask resume];
}
//POST网络请求
-(void)postURL:(NSString *)urlStr ParaStr:(NSString *)paraStr  resultBlock:(ResultBlock)block{
    //创建NSURL
    NSURL *url = [NSURL URLWithString:urlStr];
    //创建可变请求
    NSMutableURLRequest *mRequest = [NSMutableURLRequest requestWithURL:url];
    //设置POST
    [mRequest setHTTPMethod:@"POST"];
    //请求体
    [mRequest setHTTPBody:[paraStr dataUsingEncoding:NSUTF8StringEncoding]];
//    __weak typeof(self) weakSelf = self;
    NSURLSessionDataTask *dataTask = [[NSURLSession sharedSession]dataTaskWithRequest:mRequest completionHandler:block];
 
    [dataTask resume];
}
-(NSString *)strFromDict:(NSDictionary *)dict {
    //定义有值得空字符串
    NSMutableString *paraStr = [NSMutableString stringWithFormat:@"?"];
    //空数组
    NSMutableArray *array = [NSMutableArray new];
    for (NSString *key in dict) {
        NSString *str = [NSString stringWithFormat:@"%@=%@",key,dict[key]];
        [array addObject:str];
    }
    //数组拼接字符串
    NSString *para = [array componentsJoinedByString:@"&"];
    NSLog(@"%@",para);
    
    //返回
//    [paraStr appendString:para];
//    return paraStr;
    return para;
    
}
@end
